In a large mixing bowl, combine peanut butter, butter, brown sugar, and white sugar. Beat together on medium speed until smooth and creamy, about 2-3 minutes.

Carefully beat in the egg and vanilla extract into the creamy mixture, mixing until fully incorporated, about 1-2 minutes.

In a separate bowl, whisk together flour, baking soda, and salt for an even distribution.

Gradually add the dry mixture to the wet mixture, stirring gently until just combined.

Cover the bowl with plastic wrap and refrigerate for at least 1 hour.

Preheat your oven to 375°F (190°C) for baking.

Line a baking sheet with parchment paper.

Once chilled, roll dough into 1½ tablespoon-sized balls and press down with a fork.

Bake for 9-11 minutes until golden edges form while centers remain soft.

Cool on the baking sheet for 5 minutes, then transfer to a wire rack.